CN114011970A

CN114011970A - Thermoforming die punch insert with elastic supporting device

Info

Publication number: CN114011970A
Application number: CN202111336393.XA
Authority: CN
Inventors: 尚欣
Original assignee: Dongguan University of Technology
Current assignee: Dongguan University of Technology
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-02-08
Anticipated expiration: 2041-11-12
Also published as: CN114011970B

Abstract

The invention relates to the field of dies, in particular to a male die insert of a thermoforming die with an elastic supporting device, which comprises a die holder and a male insert, wherein the male insert consists of two male die half blocks, the lower parts of the contact parts of the two male die half blocks are provided with taper holes, the lower parts and the side parts of the male die half blocks are connected with the die holder through the elastic supporting device, the die holder is also provided with a wedge in a vertical direction, and the top part of the wedge is conical consistent with the shape of the taper holes. And finishing quenching.

Description

Thermoforming die punch insert with elastic supporting device

Technical Field

The invention relates to the field of dies, in particular to a male die insert of a thermoforming die with an elastic supporting device.

Background

In the field of hot stamping forming, at some parts with severe plastic deformation, the sheet material has obvious thinning phenomenon, and when an initial die is designed, gaps among all parts of the die are 1.1 times of the thickness of the material, so that the contact states of the formed part and the die at different parts are different, and therefore, in the link that heat is transferred to the die from the formed part, all parts have difference, so that the problem of uneven strength of different parts of a hot stamping part of a reinforcement can be solved, the heat transfer in the hot stamping process is divided into two stages, namely between the formed part and the die and between the die and a cooling water channel, in order to solve the problem of uneven strength of different parts of the hot stamping part of the reinforcement, the existing operation is mainly carried out from two aspects, the first is directed at the heat transfer process between the die and the cooling water channel, and particularly is optimized on the arrangement structure of the cooling water channel, for the part with poor heat dissipation condition, the cooling water channel is closer to the surface of the mold; the diameter of the cooling water channel is optimized, and for certain parts with obviously concentrated heat accumulation, a plurality of cooling water channels with small diameters are used for replacing cooling water channels with large diameters, so that the heat dissipation efficiency can be ensured, and the strength of the mold structure cannot be reduced; the second is for the heat transfer process between the form and the mold; the mold clearance at the position with poor contact state is properly reduced, the thickness of an air layer is reduced, the heat transfer efficiency is improved, and the heat in a formed piece can be transferred to the mold in time; however, although the contact state between the die and the formed article at the time of pressure holding and cooling can be improved by reducing the die gap, the quality at the time of press forming may be affected, and the tendency of the formed article to crack may be increased by an excessively small die gap.

Disclosure of Invention

The invention aims to provide a male die insert of a thermoforming die with an elastic supporting device, which is additionally provided with a wedge and an elastic supporting structure on the basis of a common insert die, so that not only can the normal die clearance during forming be ensured, the forming quality of parts be ensured, the breakage be reduced, but also the good contact state of a formed part and the die during pressure maintaining can be ensured, the smooth conduction of heat can be ensured, and the quenching can be completed.

In order to achieve the above purpose, the invention adopts the technical scheme that: the male die insert with the elastic supporting device for the thermoforming die comprises a die holder and a male insert, wherein the male insert is composed of two male die half blocks, a taper hole is formed in the lower portion of the portion, in contact with the two male die half blocks, of the lower portion and the side portion of each male die half block are connected with the die holder through the elastic supporting device, a wedge with a vertical trend is further arranged on the die holder, and the top of the wedge is conical in shape consistent with the taper hole.

Preferably, the elastic supporting device comprises supporting columns arranged on the die holder and the male die half block, supporting sleeves are sleeved on the supporting columns, two supporting sleeves of the same elastic supporting device are connected through supporting springs, and handle blocks are further arranged on the outer sides of the supporting sleeves.

Preferably, each male die half block is internally provided with a cooling water channel.

A method for manufacturing a male die insert of a thermoforming die with an elastic supporting device comprises the following steps:

the first step is as follows: carrying out hot stamping forming through the existing male die insert structure of the hot forming die, and mounting a pressure tester on the male die insert so as to test the maximum pressure in a hot stamping forming stage and the maximum pressure in a pressure maintaining stage;

a second step; according to the result of the first-step test, the number of the elastic supporting devices below the male die half block and the stiffness coefficient of the supporting spring are selected, and the top of the taper hole is prevented from contacting the top of the wedge when the supporting force of the elastic supporting devices to the lower part of the male die half block reaches the maximum pressure in the stamping forming stage; meanwhile, the pressure of the side elastic supporting device is converted into the pressure of the side elastic supporting device according to the inclination of the wedge and the taper hole and the maximum pressure in the pressure maintaining stage, and further the stiffness coefficient of a supporting spring of the side elastic supporting device is further converted into the stiffness coefficient of the supporting spring of the side elastic supporting device;

and thirdly, connecting the support spring with the selected stiffness coefficient with a support sleeve, sleeving the support sleeve with the support column, and manufacturing the male die insert of the thermoforming die with the elastic support device.

The invention can ensure normal die clearance during forming, ensure the forming quality of parts, reduce breakage, ensure good contact state of a formed part and the die during pressure maintaining, ensure smooth heat conduction and finish quenching.

According to the thermoforming mold male die insert with the elastic supporting device, which is prepared by the manufacturing method, the elastic supporting device is designed according to actual pressure, and is matched with the wedge and the taper hole to decompose the force, so that the two male die half blocks are prevented from being separated in the hot stamping forming stage, a normal mold gap can be ensured during forming, and the two male die half blocks can be separated during pressure maintaining, so that a formed part and a mold are in a good contact state.

Drawings

FIG. 1 is a male die insert of a thermoforming die with an elastic support means;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a schematic structural view of the elastic supporting device.

The text labels shown in the figures are represented as: 1. a die holder; 2. an elastic support device; 3. a male mold half; 4. a wedge; 5. a taper hole; 11. a support pillar; 12. a support sleeve; 13. a support spring; 14. a handle block.

Detailed Description

The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.

As shown in fig. 1 to 3, the specific structure of the present invention is: a male die insert of a thermoforming die with an elastic supporting device comprises a die holder 1 and a male insert, wherein the male insert consists of two male die half blocks 3, the lower parts of the parts, contacted with the two male die half blocks 3, are provided with tapered holes 5, the lower parts and the side parts of the male die half blocks 3 are connected with the die holder 1 through the elastic supporting device 2, the die holder 1 is also provided with a wedge 4 in a vertical direction, and the top of the wedge 4 is conical with the shape of the tapered holes 5; the elastic supporting device 2 comprises supporting columns 11 arranged on the die holder 1 and the male die half block 3, the supporting columns 11 are sleeved with supporting sleeves 12, the two supporting sleeves 12 of the same elastic supporting device 2 are connected through supporting springs 13, and handle blocks 14 are further arranged on the outer sides of the supporting sleeves 12; a cooling water channel is arranged in each male die half 3.

The male die insert of the hot forming die needs to be matched with a female die for use, and in the forming stage, two male die halves are supported by an elastic supporting device and matched with the female die to complete the stamping forming of parts; in the pressure maintaining and cooling stage after the male and female dies are closed, the elastic supporting devices at the bottoms of the male dies are compressed along with the continuous pressing of the press, the two half male dies are separated towards two sides under the action of the wedge, and meanwhile, the elastic supports at the two sides are compressed to finish quenching; after the pressure maintaining is finished, the press moves upwards, and the male die is restored to the original position under the action of the elastic support; under the action of the insert die with the structure, normal die clearance during forming can be ensured, the forming quality of parts is ensured, cracking is reduced, a good contact state between a formed part and the die during pressure maintaining can be ensured, heat is smoothly conducted, and quenching is completed.

And the part that elastic support device 2 compressed is supporting spring 13, and supporting spring 13 also is the wearing parts, and elastic support device 2 of this application only need draw in through the handle piece, can compress spring 13, and then will support cover and support column separation, can get rid of the change with supporting spring 13.

In actual operation, the thermoforming mold male die insert with the elastic support device prepared by the manufacturing method is needed, the elastic support device is designed according to actual pressure, and is matched with the wedge and the taper hole to decompose force, so that the two male die half blocks are prevented from being separated in a hot stamping forming stage, a normal mold gap in forming can be ensured, and the two male die half blocks can be separated in pressure maintaining to enable a formed part to be in good contact with a mold.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principle and embodiments of the present invention have been described herein by way of specific examples, which are provided only to help understand the method and the core idea of the present invention, and the above is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can also be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.

Claims

1. The utility model provides a thermoforming mould terrace die insert with elastic support device, includes die holder (1) and convex insert, its characterized in that, the convex insert constitute by two terrace die half (3), and taper hole (5) have been seted up to the position lower part of two terrace die half (3) contacts, and the lower part and the lateral part of terrace die half (3) all are connected with die holder (1) through elastic support device (2), die holder (1) on still be provided with slide wedge (4) of vertical trend, and the top of slide wedge (4) be the toper unanimous with taper hole (5) shape.

2. The male die insert of the thermoforming die with an elastic supporting device, as claimed in claim 1, wherein the elastic supporting device (2) comprises supporting columns (11) arranged on the die holder (1) and the male die half (3), the supporting columns (11) are sleeved with supporting sleeves (12), two supporting sleeves (12) of the same elastic supporting device (2) are connected through supporting springs (13), and a handle block (14) is further arranged on the outer side of each supporting sleeve (12).

3. A thermoforming die punch insert with resilient support means as claimed in claim 1, characterised in that a cooling water circuit is provided in each punch half (3).